Celebrities in rehab

It is alleged that Charlie Sheen suffers from a sex addiction. He has not publicly acknowledged his addiction, but Sheen's ex-wife Denise Richards states he was addicted to internet porn. Currently, Sheen plays the roll of a sex crazed songwriter on the sitcom Two and a Half Men.

US actress Lindsay Lohan leaves court in Beverly Hills, California on October 22, 2010 after a probation hearing. Los Angeles Superior Court Judge Elden S. Fox ordered the 24-year-old troubled starlet back to rehab, telling her she was an addict and faced jail time if she relapsed again. Lohan will remain at the Betty Ford Center until January 3, 2010 and report back to court in late February. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

David Arquette arrives at the Scream Awards on Saturday Oct. 16, 2010, in Los Angeles. (AP Photo/Matt Sayles)

LOS ANGELES, CA - OCTOBER 12: Recording artist Demi Lovato attends the 2010 American Music Awards Nominations Press Conference held at The Mixing Room at the JW Marriott Los Angeles at L.A. LIVE on October 12, 2010 in Los Angeles, California. (Photo by Kevin Winter/Getty Images) *** Local Caption *** Demi Lovato

LOS ANGELES, CA - JANUARY 31: Musician Aaron Carter arrives at the 52nd Annual GRAMMY Awards held at Staples Center on January 31, 2010 in Los Angeles, California. (Photo by John Shearer/WireImage) *** Local Caption *** Aaron Carter

LONDON, ENGLAND - FEBRUARY 21: (UK TABLOID NEWSPAPERS OUT) Jonathan Rhys Meyers poses in front of the winners boards at the Orange British Academy Film Awards held at The Royal Opera House on February 21, 2010 in London, England. (Photo by Dave Hogan/Getty Images) *** Local Caption *** Jonathan Rhys Meyers

Jesse James attends the opening of Wonderland Gallery on September 2, 2010 in West Hollywood, California.

LOS ANGELES, CA - NOVEMBER 23: Singer Steven Tyler of Aerosmith arrives at the 2008 American Music Awards held at Nokia Theatre L.A. LIVE on November 23, 2008 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images for AMA) *** Local Caption *** Steven Tyler

Tiger Woods listens to a question during a news conference in Miyazaki, Japan in this November 15, 2006 file photo. Woods, the superstar golfer who took an indefinite break from the game in December after admitting marital infidelity, will make a public statement on February 19th to discuss his playing future. The world number one has been in hiding since the tawdry revelations about his personal life erupted after a minor car accident outside his Florida home in November. Woods plans to address a small gathering of reporters in Ponte Vedra Beach. REUTERS/Toru Hanai/Files (JAPAN - Tags: SPORT GOLF HEADSHOT)

LONDON - SEPTEMBER 17: Mischa Barton attends the Samsung Imagination Icon Series, The Red Thread: The Inspiration and Passion of Valentino Garavani at the Hospital Club on September 17, 2008 in London, England. (Photo by Tim Whitby/Getty Images for Samsung)

David Duchovny has, in the past, voluntarily sought treatment for a sex addiction, and has talked about his internet pornography obsession. Ironically, he portrays a sexually compulsive writer on Showtime's Californication.

Actor David Hasselhoff of Baywatch and Knight Rider fame, admits to an alcohol addiction that began in the early 1970s. While struggling to find work, Hasselhoff reveals he found comfort in beer, scotch, and tequila. Hasselhoff fled a rehab center in 2002 wearing only sweatpants, a tank top, and tennis shoes. In 2007, his addictions once again made headlines after his teenage daughter filmed him during a drunken episode.

Wynonna Judd shot to stardom when she sang with her mother as country duo The Judds. On a 2003 Oprah Winfrey Show appearance, Wynonna discussed her \"severe dependency on food\". Wynonna was treated for a food addiction at the Shades of Hope rehab center in Texas.

Robert Downey Jr.

epa01477832 US actress and cast member Tara Reid arrives for the premiere of 'The Women' in Los Angeles, California, USA, 04 September 2008. Messing plays the role of 'Edie Cohen' in the film which centers on a group of gossipy, high-society women who spend their days at the beauty salon and fashion shows. EPA/PAUL BUCK

** FILE ** Singer Amy Winehouse arrives at the MTV Movie Awards in Los Angeles, in this June 3, 2007, file photo. (AP Photo/Kevork Djansezian, file)

PARIS - APRIL 27: Actress Kirsten Dunst arrives to attend the ''Spider-Man 3'' premiere on April 27, 2007 in Paris,France. (Photo by Francois Durand/Getty Images) *** Local Caption *** Kirsten Dunst

Berlin, GERMANY: US actress Eva Mendes poses on the red carpet prior the Golden Camera awards ceremony 01 February 2007 in Berlin. The \"Goldene Kamera\" is a German media prize organized by TV magazine Hoerzu and awards celebrities in different categories. AFP PHOTO DDP/MARCUS BRANDT GERMANY OUT (Photo credit should read MARCUS BRANDT/AFP/Getty Images)

OXFORD, MS - OCTOBER 1: Delta Burke talks backstage at Mississippi Rising, a benefit for Hurricane Katrina victims, on October 1, 2005 in Oxford, Mississippi. (Photo by Marianne Todd/Getty Images)

HOLLYWOOD, CA - SEPTEMBER 23: Actress Samaire Armstrong attends the premiere for \"Dirty Sexy Money\" at the paramount Theatre September 23, 2007 in Hollywood, California. (Photo by Mark Mainz/Getty Images) *** Local Caption *** Samaire Armstrong

*** FILE *** Musician Eddie Van Halen arrives at the 14th Annual Elton John Academy Awards Viewing Dinner and After-Party in West Hollywood, Calif., Sunday, March 5, 2006. In a statement addressed to fans Thursday March 8, 2007 on Van Halen's Web site, the guitarist said he decided to seek treatment because \"at the moment I do not feel that I can give you my best.\" \"That's why I have decided to enter a rehabilitation facility to work on myself, so that in the future I can deliver the 110 percent that I feel I owe you and want to give you,\" the statement said. (AP Photo/Matt Sayles)

Britney Spears shaves her head and gets two tattoos Feb 16, 2007 X17online*****PLEASE NOTE - THIS PHOTO CAN ONLY BE USED WITH THE BYLINE X17ONLINE.COM AND ONLY UNTIL MARCH 19, 2006****

**FILE PHOTO** Actor Isaiah Washington attends the 22nd Annual Television Critics Association Awards in this July 23, 2006 file photo in Pasadena, Calif. (AP Photo/Phil McCarten, file)

Miss USA 2006 Tara Conner, leaves a news conference on Tuesday, Dec. 19, 2006 in New York City. Conner, who had come under criticism amid rumors she had been frequenting bars while underage, will be allowed to keep her title, Donald Trump announced at the news conference. (AP Photo/Rick Maiman)

US rapper Eminem performs at the MTV Europe Music Awards 2004 ceremony in Rome, Thursday, Nov. 18, 2004. (AP Photo/Andrew Medichini)

Singer Whitney Houston (L) and her husband, singer Bobby Brown, pose in Beverly Hills, California, in this October 11, 1998 file photo. Houston has filed for divorce from Brown, her spokeswoman said on September 13, 2006, following 14 tumultuous years of marriage and tabloid headlines. REUTERS/Fred Prouser/Files

Courtney Love arrives at the film premiere of 'Borat: Cultural Learnings of America for Make Benefit Glorious Nation of Kazakhstan\" in the Hollywood section of Los Angeles, Monday, Oct. 23, 2006. (AP Photo/Matt Sayles)

LONDON - DECEMBER 17: (UK TABLOID NEWSPAPERS OUT) (L-R) Sharon Osbourne, Jack Osbourne, Ozzy Osbourne and Kelly Osbourne appear as guest presenters on MTV TRL at The Penthouse, Leicester Square on December 17, 2004 in London. (Photo by Dave Hogan/Getty Images) *** Local Caption *** Ozzy Osbourne;Sharon Osbourne;Jack Osbourne;Kelly Osbourne

NEW YORK - DECEMBER 01: Model Kate Moss arrives for the Sam & Ruby Charity Benefit hosted by Nikon and herself at the MILK Gallery on December 01, 2006 in New York City. (Photo by Scott Wintrow/Getty Images)

Actor/director Mel Gibson smiles after accepting the Chairman's Visionary Award during the first annual Latino Global Business Conference and Digital Expo in Beverly Hills, Calif., Thursday, Nov. 2, 2006. (AP Photo/Matt Sayles)

**FILE**Actress Mary-Kate Olsen signs autographs at the premiere of her film \"New York Minute\" held at Grauman's Chinese Theatre in Los Angeles on May 1, 2004. (AP Photo/Chris Polk)

NEW YORK - DECEMBER 15: Rapper Foxy Brown appears during a press conference to discuss her hearing loss at the BET Music Studios December 15, 2005 in New York City. (Photo by Scott Gries/Getty Images)

(FILES) File photo dated 16 March 2006 shows former World Heavyweight Boxing (WBO) champion Mike Tyson addressing a press conference in Manchester, United Kingdom. Tyson was arrested early 29 December 2006 on drink-driving and drugs charges after nearly crashing into a police car as he left a nightclub in Scottsdale, Arizona. AFP PHOTO/Andrew YATES-FILES (Photo credit should read ANDREW YATES/AFP/Getty Images)

Nicole Richie arrives for the EMI post Grammy party at the Beverly Hills Hotel in Beverly Hills, in this February 13, 2005 file photo. Socialite Richie, whose rail-thin appearance in recent photos has stoked tabloid speculation of an eating disorder, has checked into a treatment facility to address her inability to gain weight, her publicist said on October 26, 2006. REUTERS/Gene Blevins/Files (UNITED STATES)

**FILE** Keith Urban walks across the stage to accept his award for video of the year at the CMT Music Awards show on Monday, April 10, 2006 in Nashville, Tenn. Urban will launch the North American leg of his world tour June 8 in Phoenix, marking his return to U.S. concert stages after undergoing treatment for alcohol abuse. \"I'm looking forward to getting back on the road, to reconnecting with everyone and to doing what it is that I love to do,\" he said in a statement released Thursday Jan. 25, 2007. (AP Photo/Brainerd Dispatch, Steve Kohls, file)

Robin Williams arrives at the 33rd Annual People's Choice Awards on Tuesday, Jan. 9, 2007, in Los Angeles. (AP Photo/Dan Steinberg)

Hamburg, GERMANY: US singer Billy Joel performs during a concert 29 June 2006 in Hamburg, northern Germany. AFP PHOTO DDP/ROLAND MAGUNIA GERMANY OUT (Photo credit should read ROLAND MAGUNIA/AFP/Getty Images)